Geometric magnonics with chiral magnetic domain walls

Abstract

Spin wave, the collective excitation of magnetic order, is one of the fundamental angular momentum carriers in magnetic systems. Understanding the spin wave propagation in magnetic textures lies in the heart of developing pure magnetic information processing schemes. Here we show that the spin wave propagation across a chiral domain wall follows simple geometric trajectories, similar to the geometric optics. And the geometric behaviors are qualitatively different in normally magnetized film and tangentially magnetized film. We identify the lateral shift, refraction, and total reflection of spin wave across a ferromagnetic domain wall. Moreover, these geometric scattering phenomena become polarization-dependent in antiferromagnets, indicating the emergence of spin wave birefringence inside antiferromagnetic domain wall.

arXiv comment9 pages, 5 figures

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Cited by in corpus (6)

• Unveiling Stable One-dimensional Magnetic Solitons in Magnetic Bilayers
• Curvilinear manipulation of polarized spin wave
• Magnetically switchable spin wave retarder with $90^{\circ }$ antiferromagnetic domain wall
• Magnon-driven dynamics of frustrated skyrmion in synthetic antiferromagnets: Effect of skyrmion precession
• Anatomy of spin wave driven magnetic texture motion via magnonic torques
• A second-order semi-implicit method for the inertial Landau-Lifshitz-Gilbert equation